| Holtek ht16k33 RAM mapping 16*8 LED controller driver with keyscan |
| ------------------------------------------------------------------------------- |
| |
| Required properties: |
| - compatible: "holtek,ht16k33" |
| - reg: I2C slave address of the chip. |
| - interrupts: Interrupt specification for the key pressed interrupt. |
| - refresh-rate-hz: Display update interval in HZ. |
| - debounce-delay-ms: Debouncing interval time in milliseconds. |
| - linux,keymap: The keymap for keys as described in the binding |
| document (devicetree/bindings/input/matrix-keymap.txt). |
| |
| Optional properties: |
| - linux,no-autorepeat: Disable keyrepeat. |
| - default-brightness-level: Initial brightness level [0-15] (default: 15). |
| |
| Example: |
| |
| &i2c1 { |
| ht16k33: ht16k33@70 { |
| compatible = "holtek,ht16k33"; |
| reg = <0x70>; |
| refresh-rate-hz = <20>; |
| debounce-delay-ms = <50>; |
| interrupt-parent = <&gpio4>; |
| interrupts = <5 (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_EDGE_RISING)>; |
| linux,keymap = < |
| MATRIX_KEY(2, 0, KEY_F6) |
| MATRIX_KEY(3, 0, KEY_F8) |
| MATRIX_KEY(4, 0, KEY_F10) |
| MATRIX_KEY(5, 0, KEY_F4) |
| MATRIX_KEY(6, 0, KEY_F2) |
| MATRIX_KEY(2, 1, KEY_F5) |
| MATRIX_KEY(3, 1, KEY_F7) |
| MATRIX_KEY(4, 1, KEY_F9) |
| MATRIX_KEY(5, 1, KEY_F3) |
| MATRIX_KEY(6, 1, KEY_F1) |
| >; |
| }; |
| }; |
